Periductal Mastitis

What it is

Periductal mastitis happens when a milk duct just beneath your nipple becomes inflamed and blocked. This is not an infection, but sometimes an infection can develop in the blocked duct. It can affect one or both breasts.

How common it is

This condition is most often seen in women under 50. It is much more common in people who smoke.

What you may notice

You might feel tenderness or pain around your nipple. You could also see nipple discharge that may be thick and green, black, or bloody. Sometimes, a small, tender lump can be felt right behind the nipple.

What can contribute

The exact cause is not always clear, but it is very strongly linked to smoking. Nipple piercings can also sometimes be a factor.

How it is usually checked

To understand what is going on, your provider will likely do a physical exam of your breast. They may use an ultrasound to get a closer look at the ducts behind the nipple. If there is discharge, they might collect a small sample to check for infection.

Does this change my long-term risk?

Periductal mastitis is a benign condition, which means it is not a health risk by itself. Having it does not change your long-term breast health risk, but it is always important to have any new breast changes checked by a provider.

Comfort and everyday care

• Applying a warm, damp cloth to the nipple area may help soothe discomfort.
• If you smoke, getting support to quit can help manage this condition and lower the chance of it returning.
• Wearing a soft, comfortable bra can help reduce irritation to the nipple.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.